05-12-2009
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
directory name = /usr/tom/1997
files -
ABC_1997_ST1_BCD.SQL
BCD_1997_ST1_EFG_SAB.SQL
TTT_EBC_1997_ST1_A.SQL
sub directory - /usr/tom/1997/jan
a) I want to just rename the all files ending with '.SQL' and also its contents in the 1997 directory(excluding subdirectories eg... (3 Replies)
Discussion started by: systemsb
3 Replies
2. AIX
Hi,
From some time, we have noticed that our ascii files have started corrupting due to the presence of some random control characters (^@, ^M, ^H, ^D). The characters appear randomly on any file after the process that creates the file finishes. If we rerun the process, the files re creates... (0 Replies)
Discussion started by: aakashahuja
0 Replies
3. Shell Programming and Scripting
hi,
I have the following files as below.
reg_test_123232
reg_test_125654
reg_test_473843
How do I rename reg_test_123232 to abc_123232 and the rest of file by just keeping the numeric field ?
Please advise :) (3 Replies)
Discussion started by: cedrichiu
3 Replies
4. UNIX for Dummies Questions & Answers
Hello!
I am not familiar with UNIX and I have this problem:
I need to move files from a UNIX machine to a PC. UNIX file names contain ":" as special character which is not recognized in a PC.
How can I change ":" for "_" in the name of a bunch of files in UNIX?
Thanks for your help. (7 Replies)
Discussion started by: Tygoon
7 Replies
5. Shell Programming and Scripting
Hello,
I wanted to rename one file where filename contains space.. How can i rename in unix?
The file name is ABC XYZ.TXT
I wanted to rename this file as ABCXYZ.TXT.
Any help is greatly appreciated...
Regards. (4 Replies)
Discussion started by: govindts
4 Replies
6. Shell Programming and Scripting
Hi All
I have a folder that contains hundreds of file with a names
3.msa
4.msa
21.msa
6.msa
345.msa
456.msa
98.msa
...
...
...
I need rename each of this file by adding "core_" in the begiining of each file such as
core_3.msa
core_4.msa
core_21.msa (4 Replies)
Discussion started by: Lucky Ali
4 Replies
7. Shell Programming and Scripting
What I have are two text files that I need to shuffle randomly, but I need the two files to be randomly shuffled the same way. I have heard of shuf but I do not know how to use it for two files. Maybe there is also an easy/simple awk command I do not know about that could handle this problem.
... (3 Replies)
Discussion started by: adrunknarwhal
3 Replies
8. Shell Programming and Scripting
I have two files containing hundreds of different sequences with the same Identifiers (ID-001, ID-002, etc.,), something like this:
Infile1:
ID-001 ATGGGAGCGGGGGCGTCTGCCTTGAGGGGAGAGAAGCTAGATACA
ID-002 ATGGGAGCGGGGGCGTCTGTTTTGAGGGGAGAGAAGCTAGATACA
ID-003... (18 Replies)
Discussion started by: Xterra
18 Replies
9. UNIX for Dummies Questions & Answers
Hi,
I have 31 file as below.... dt_ref_med_merged_madt_h_19980101.nc
..
..
dt_ref_med_merged_madt_h_19980131.nc
I want to rename it like...
dt_ref_med_merged_madt_h_1998_1.nc
..
..
dt_ref_med_merged_madt_h_1998_31.nc
How can I do it ? any suggestions ? I want to do it small... (5 Replies)
Discussion started by: mahesh shinde
5 Replies
10. Shell Programming and Scripting
Hi,
In sftp script to get files, I have to rename all the files which I am picking. Rename command does not work here. Is there any way to do this?
I am using #!/bin/ksh
For eg: sftp user@host <<EOF
cd /path
get *.txt
rename *.txt *.txt.done
... (7 Replies)
Discussion started by: jhilmil
7 Replies
LEARN ABOUT MOJAVE
random
RANDOM(4) BSD Kernel Interfaces Manual RANDOM(4)
NAME
random , urandom -- random data source devices.
SYNOPSIS
pseudo-device random
DESCRIPTION
The random device produces uniformly distributed random byte values of potentially high quality.
To obtain random bytes, open /dev/random for reading and read from it.
The same random data is also available from getentropy(2). Using the getentropy(2) system call interface will provide resiliency to file
descriptor exhaustion, chroot, or sandboxing which can make /dev/random unavailable. Additionally, the arc4random(3) API provides a fast
userspace random number generator built on the random data source and is preferred over directly accessing the system's random device.
/dev/urandom is a compatibility nod to Linux. On Linux, /dev/urandom will produce lower quality output if the entropy pool drains, while
/dev/random will prefer to block and wait for additional entropy to be collected. With Yarrow, this choice and distinction is not necessary,
and the two devices behave identically. You may use either.
The random device implements the Yarrow pseudo random number generator algorithm and maintains its entropy pool. The kernel automatically
seeds the algorithm with additional entropy during normal execution.
FILES
/dev/random
/dev/urandom
HISTORY
A random device appeared in the Linux operating system.
Darwin September 6, 2001 Darwin